how your car will catch the dust from the brakes

In all likelihood, our cars will have to meet a limit on particulate emissions from brake pads from 2025. Several indiscretions in recent days have been corroborated by a written statement by Mr. Thierry Breton, European Commissioner for the Internal Market, almost a year ago.. This is a small revolution for the car, because the limitation of the dust of the brakes, although known for a long time as that of the tires, has never been taken into account.

Read also: when the CEO of Renault addresses the Euro7 standard

High goals

But obviously several equipment manufacturers have well-developed ideas for limiting particulate pollution from brakes. The French company Tallano has developed a system called “Tamic”, an acronym for microparticle suction turbine, which consists of connecting a suction tube directly to the brake pad. To do this, we need to modify the brake pad we know, that is, perforated to fit the tube and slotted to pick up dust.. The particles aspirated by the turbine are sent to a filter and stored until the next maintenance.

According to Christophe Rocca-Serra, CEO of Tallano, approximately 98% of the brake dust would be trapped in this way. The system is so promising that Tallano, allied with French equipment maker Akwel, has already received an order from a manufacturer to limit the braking emissions of “big SUVs”.. The CEO of Tallano, in fact, advances a rather low price for the Tamic: approximately € 350 excluding VAT for the complete system, knowing that maintenance must be done every two years or 30,000 kilometers. And if the Tamic were to be produced on a large scale tomorrow, prices could drop rapidly below € 200, according to Mr Rocca Serra.

Stainless steel filter, tungsten carbide disc …

German filtration specialist Mann Hummel has also prepared a system that provides an additional module to the brake disc. Inside the module, a filter made of stainless steel fiber recovers the brake particles. Its service life would correspond to that of the pads, which can reach up to several years for some users. According to Mann Hummel, the filter would have an efficiency of reducing the emission of brake particles between 20 and 40%. Rather cheap too, this filter system would require an investment of less than 100 euros per wheel … The German equipment manufacturer is running prototypes but has not yet convinced any manufacturer to assemble its product in series so far.

Vacuum cleaner and filters

Vacuum cleaner, filter … Bosch, for its part, has chosen a different path. Without prejudging his future products, the German giant already offers a brake disc called “idisc”. He describes it as “a common cast iron brake disc” with a tungsten carbide coating applied. : “This coating not only reduces brake dust, but also increases braking safety several times in a row.Coated with this, the disc would also be less sensitive to corrosion and would provide a 90% reduction in brake dust …

Who will check their brake dust?

Regardless of the system finally chosen, the truth is that so far neither the brake particle measurement system nor the limit values ​​not to be exceeded are known. All of this should be clarified by July 20th. Once this first step has been taken, equipment manufacturers and suppliers should be able to choose from the different solutions already available.. Because “more than half of the fine particles emitted by recent road vehicles no longer come from the exhaust” according to a “note” published by Ademe on April 22, 2022.

Thus, the dust of the brakes, but also of the tires and the abrasion of the road are now the main cocktail of particles for which vehicles are responsible, and not only with internal combustion engines (gasoline, diesel, etc.). Because Ademe points out that an electric vehicle certainly brakes less than a thermal vehicle thanks to its regenerative braking but that, on the other hand, “the mass of electric vehicles is greater than that of thermal vehicles, this affects the tire width and therefore increases tire / road particulate emissions “. Brake particles, especially fine ones, would pose great dangers to public health because they have the ability to penetrate the lung system, and even the blood..

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